[FFmpeg-cvslog] lavc: add a OpenEXR decoder
Jimmy Christensen
git at videolan.org
Fri Apr 6 08:47:18 CEST 2012
ffmpeg | branch: master | Jimmy Christensen <jimmy at ghost.dk> | Fri Apr 6 06:02:25 2012 +0200| [b7ce3242f8000ad497a17c3288a59aa508cef31c] | committer: Michael Niedermayer
lavc: add a OpenEXR decoder
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b7ce3242f8000ad497a17c3288a59aa508cef31c
---
Changelog | 2 +-
doc/general.texi | 2 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/avcodec.h | 1 +
libavcodec/exr.c | 485 ++++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/version.h | 2 +-
libavformat/img2.c | 1 +
libavformat/isom.c | 1 +
libavformat/riff.c | 1 +
10 files changed, 495 insertions(+), 2 deletions(-)
diff --git a/Changelog b/Changelog
index f46ee0a..e0155b1 100644
--- a/Changelog
+++ b/Changelog
@@ -20,7 +20,7 @@ version next:
- ZeroCodec decoder
- tile video filter
- Metal Gear Solid: The Twin Snakes demuxer
-
+- OpenEXR image decoder
version 0.10:
- Fixes: CVE-2011-3929, CVE-2011-3934, CVE-2011-3935, CVE-2011-3936,
diff --git a/doc/general.texi b/doc/general.texi
index 8f62741..c633ba6 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -372,6 +372,8 @@ following image formats are supported:
@tab Microsoft BMP image
@item DPX @tab X @tab X
@tab Digital Picture Exchange
+ at item EXR @tab @tab X
+ @tab OpenEXR
@item JPEG @tab X @tab X
@tab Progressive JPEG is not supported.
@item JPEG 2000 @tab X @tab X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index d554df5..e8c2fd5 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -160,6 +160,7 @@ OBJS-$(CONFIG_EIGHTSVX_FIB_DECODER) += 8svx.o
OBJS-$(CONFIG_EIGHTSVX_RAW_DECODER) += 8svx.o
OBJS-$(CONFIG_ESCAPE124_DECODER) += escape124.o
OBJS-$(CONFIG_ESCAPE130_DECODER) += escape130.o
+OBJS-$(CONFIG_EXR_DECODER) += exr.o
OBJS-$(CONFIG_FFV1_DECODER) += ffv1.o rangecoder.o
OBJS-$(CONFIG_FFV1_ENCODER) += ffv1.o rangecoder.o
OBJS-$(CONFIG_FFVHUFF_DECODER) += huffyuv.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 76daafd..4a24d31 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -113,6 +113,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (EIGHTSVX_FIB, eightsvx_fib);
REGISTER_DECODER (ESCAPE124, escape124);
REGISTER_DECODER (ESCAPE130, escape130);
+ REGISTER_DECODER (EXR, exr);
REGISTER_ENCDEC (FFV1, ffv1);
REGISTER_ENCDEC (FFVHUFF, ffvhuff);
REGISTER_ENCDEC (FLASHSV, flashsv);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 28c3a50..ea833d0 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -251,6 +251,7 @@ enum CodecID {
CODEC_ID_ZEROCODEC,
CODEC_ID_Y41P = MKBETAG('Y','4','1','P'),
CODEC_ID_ESCAPE130 = MKBETAG('E','1','3','0'),
+ CODEC_ID_EXR = MKBETAG('0','E','X','R'),
CODEC_ID_AVRP = MKBETAG('A','V','R','P'),
CODEC_ID_G2M = MKBETAG( 0 ,'G','2','M'),
diff --git a/libavcodec/exr.c b/libavcodec/exr.c
new file mode 100644
index 0000000..d18e1f0
--- /dev/null
+++ b/libavcodec/exr.c
@@ -0,0 +1,485 @@
+/*
+ * OpenEXR (.exr) image decoder
+ * Copyright (c) 2009 Jimmy Christensen
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file libavcodec/exr.c
+ * OpenEXR decoder
+ * @author Jimmy Christensen
+ *
+ * For more information on the OpenEXR format, visit:
+ * http://openexr.com/
+ *
+ * exr_flt2uint() and exr_halflt2uint() is credited to Reimar Döffinger
+ */
+
+#include "avcodec.h"
+#include "bytestream.h"
+#include "libavutil/imgutils.h"
+
+enum ExrCompr {
+ EXR_RAW = 0,
+ EXR_RLE = 1,
+ EXR_ZIP1 = 2,
+ EXR_ZIP16 = 3,
+ EXR_PIZ = 4,
+ EXR_B44 = 6
+};
+
+typedef struct EXRContext {
+ AVFrame picture;
+ int compr;
+ int bits_per_color_id;
+ int8_t channel_offsets[3]; // 0 = red, 1 = green and 2 = blue
+} EXRContext;
+
+/**
+ * Converts from 32-bit float as uint32_t to uint16_t
+ *
+ * @param v 32-bit float
+ * @return normalized 16-bit unsigned int
+ */
+static inline uint16_t exr_flt2uint(uint32_t v)
+{
+ unsigned int exp = v >> 23;
+ // "HACK": negative values result in exp< 0, so clipping them to 0
+ // is also handled by this condition, avoids explicit check for sign bit.
+ if (exp<= 127 + 7 - 24) // we would shift out all bits anyway
+ return 0;
+ if (exp >= 127)
+ return 0xffff;
+ v &= 0x007fffff;
+ return (v + (1 << 23)) >> (127 + 7 - exp);
+}
+
+/**
+ * Converts from 16-bit float as uint16_t to uint16_t
+ *
+ * @param v 16-bit float
+ * @return normalized 16-bit unsigned int
+ */
+static inline uint16_t exr_halflt2uint(uint16_t v)
+{
+ int exp = v >> 10;
+ if (v & 0x8000)
+ return 0;
+ if (!exp)
+ return (v >> 9) & 1;
+ if (exp >= 15)
+ return 0xffff;
+ v <<= 6;
+ return (v + (1 << 16)) >> (15 - exp);
+}
+
+/**
+ * Gets the size of the header variable
+ *
+ * @param **buf the current pointer location in the header where
+ * the variable data starts
+ * @param *buf_end pointer location of the end of the buffer
+ * @return size of variable data
+ */
+static unsigned int get_header_variable_length(const uint8_t **buf,
+ const uint8_t *buf_end)
+{
+ unsigned int variable_buffer_data_size = bytestream_get_le32(buf);
+ if (variable_buffer_data_size >= buf_end - *buf)
+ return 0;
+ return variable_buffer_data_size;
+}
+
+/**
+ * Checks if the variable name corresponds with it's data type
+ *
+ * @param *avctx the AVCodecContext
+ * @param **buf the current pointer location in the header where
+ * the variable name starts
+ * @param *buf_end pointer location of the end of the buffer
+ * @param *value_name name of the varible to check
+ * @param *value_type type of the varible to check
+ * @param minimum_length minimum length of the variable data
+ * @param variable_buffer_data_size variable length read from the header
+ * after it's checked
+ * @return zero if variable is invalid and 1 if good
+ */
+static unsigned int check_header_variable(AVCodecContext *avctx,
+ const uint8_t **buf,
+ const uint8_t *buf_end,
+ const char *value_name,
+ const char *value_type,
+ unsigned int minimum_length,
+ unsigned int *variable_buffer_data_size)
+{
+ if (buf_end - *buf >= minimum_length && !strcmp(*buf, value_name)) {
+ *buf += strlen(value_name)+1;
+ if (!strcmp(*buf, value_type)) {
+ *buf += strlen(value_type)+1;
+ *variable_buffer_data_size = get_header_variable_length(buf, buf_end);
+ if (!*variable_buffer_data_size)
+ av_log(avctx, AVERROR_INVALIDDATA, "Incomplete header\n");
+ return 1;
+ }
+ *buf -= strlen(value_name)+1;
+ av_log(avctx, AV_LOG_WARNING, "Unknown data type for header variable %s\n", value_name);
+ }
+ return 0;
+}
+
+static int decode_frame(AVCodecContext *avctx,
+ void *data,
+ int *data_size,
+ AVPacket *avpkt)
+{
+ const uint8_t *buf = avpkt->data;
+ unsigned int buf_size = avpkt->size;
+ const uint8_t *buf_end = buf + buf_size;
+
+ EXRContext *const s = avctx->priv_data;
+ AVFrame *picture = data;
+ AVFrame *const p = &s->picture;
+ uint8_t *ptr;
+
+ int x, y, stride, magic_number, version_flag;
+ int w = 0;
+ int h = 0;
+ unsigned int xmin = ~0;
+ unsigned int xmax = ~0;
+ unsigned int ymin = ~0;
+ unsigned int ymax = ~0;
+ unsigned int xdelta = ~0;
+
+ unsigned int current_channel_offset = 0;
+
+ s->channel_offsets[0] = -1;
+ s->channel_offsets[1] = -1;
+ s->channel_offsets[2] = -1;
+ s->bits_per_color_id = -1;
+
+ magic_number = bytestream_get_le32(&buf);
+ if (magic_number != 20000630) { // As per documentation of OpenEXR it's supposed to be int 20000630 little-endian
+ av_log(avctx, AVERROR_INVALIDDATA, "Wrong magic number %d\n", magic_number);
+ return -1;
+ }
+
+ version_flag = bytestream_get_le32(&buf);
+ if ((version_flag & 0x200) == 0x200) {
+ av_log(avctx, AVERROR_NOFMT, "Tile based images are not supported\n");
+ return -1;
+ }
+
+ if (buf_end - buf < 10) {
+ av_log(avctx, AVERROR_INVALIDDATA, "Too short header to parse\n");
+ return -1;
+ }
+
+ // Parse the header
+ while (buf[0] != 0x0) {
+ unsigned int variable_buffer_data_size;
+ // Process the channel list
+ if (check_header_variable(avctx, &buf, buf_end, "channels", "chlist", 38, &variable_buffer_data_size)) {
+ const uint8_t *channel_list_end;
+ if (!variable_buffer_data_size)
+ return -1;
+
+ channel_list_end = buf + variable_buffer_data_size + 4;
+ while (channel_list_end - buf >= 19) {
+ int current_bits_per_color_id = -1;
+ int channel_index = -1;
+
+ if (!strcmp(buf, "R"))
+ channel_index = 0;
+ if (!strcmp(buf, "G"))
+ channel_index = 1;
+ if (!strcmp(buf, "B"))
+ channel_index = 2;
+
+ while (bytestream_get_byte(&buf) && buf < channel_list_end)
+ continue; /* skip */
+
+ if (channel_list_end - * &buf < 4) {
+ av_log(avctx, AVERROR_INVALIDDATA, "Incomplete header\n");
+ return -1;
+ }
+
+ current_bits_per_color_id = bytestream_get_le32(&buf);
+ if (current_bits_per_color_id > 2) {
+ av_log(avctx, AVERROR_NOFMT, "Unknown color format\n");
+ return -1;
+ }
+
+ if (channel_index >= 0) {
+ if (s->bits_per_color_id != -1 && s->bits_per_color_id != current_bits_per_color_id) {
+ av_log(avctx, AVERROR_NOFMT, "RGB channels not of the same depth\n");
+ return -1;
+ }
+ s->bits_per_color_id = current_bits_per_color_id;
+ s->channel_offsets[channel_index] = current_channel_offset;
+ }
+
+ current_channel_offset += 1 << current_bits_per_color_id;
+ buf += 12;
+ }
+
+ /* Check if all channels are set with an offset or if the channels
+ * are causing an overflow */
+
+ if (FFMIN3(s->channel_offsets[0],
+ s->channel_offsets[1],
+ s->channel_offsets[2]) < 0) {
+ if (s->channel_offsets[0] < 0)
+ av_log(avctx, AVERROR_NOFMT, "Missing red channel\n");
+ if (s->channel_offsets[1] < 0)
+ av_log(avctx, AVERROR_NOFMT, "Missing green channel\n");
+ if (s->channel_offsets[2] < 0)
+ av_log(avctx, AVERROR_NOFMT, "Missing blue channel\n");
+ return -1;
+ }
+
+ buf = channel_list_end;
+ continue;
+ }
+
+ // Process the dataWindow variable
+ if (check_header_variable(avctx, &buf, buf_end, "dataWindow", "box2i", 31, &variable_buffer_data_size)) {
+ if (!variable_buffer_data_size)
+ return -1;
+
+ xmin = AV_RL32(buf);
+ ymin = AV_RL32(buf + 4);
+ xmax = AV_RL32(buf + 8);
+ ymax = AV_RL32(buf + 12);
+ xdelta = (xmax-xmin) + 1;
+
+ buf += variable_buffer_data_size;
+ continue;
+ }
+
+ // Process the displayWindow variable
+ if (check_header_variable(avctx, &buf, buf_end, "displayWindow", "box2i", 34, &variable_buffer_data_size)) {
+ if (!variable_buffer_data_size)
+ return -1;
+
+ w = AV_RL32(buf + 8) + 1;
+ h = AV_RL32(buf + 12) + 1;
+
+ buf += variable_buffer_data_size;
+ continue;
+ }
+
+ // Process the lineOrder variable
+ if (check_header_variable(avctx, &buf, buf_end, "lineOrder", "lineOrder", 25, &variable_buffer_data_size)) {
+ if (!variable_buffer_data_size)
+ return -1;
+
+ if (*buf) {
+ av_log(avctx, AVERROR_NOFMT, "Doesn't support this line order : %d\n", *buf);
+ return -1;
+ }
+
+ buf += variable_buffer_data_size;
+ continue;
+ }
+
+ // Process the compression variable
+ if (check_header_variable(avctx, &buf, buf_end, "compression", "compression", 29, &variable_buffer_data_size)) {
+ if (!variable_buffer_data_size)
+ return -1;
+
+ switch (*buf) {
+ case EXR_RAW:
+ s->compr = *buf;
+ break;
+ case EXR_RLE:
+ case EXR_ZIP1:
+ case EXR_ZIP16:
+ case EXR_PIZ:
+ case EXR_B44:
+ default:
+ av_log(avctx, AVERROR_NOFMT, "This type of compression is not supported\n");
+ return -1;
+ }
+
+ buf += variable_buffer_data_size;
+ continue;
+ }
+
+ // Check if there is enough bytes for a header
+ if (buf_end - buf <= 9) {
+ av_log(avctx, AVERROR_INVALIDDATA, "Incomplete header\n");
+ return -1;
+ }
+
+ // Process unknown variables
+ for (int i = 0; i < 2; i++) {
+ // Skip variable name/type
+ while (buf++ < buf_end)
+ if (buf[0] == 0x0)
+ break;
+ }
+ buf++;
+ // Skip variable length
+ if (buf_end - buf >= 5) {
+ variable_buffer_data_size = get_header_variable_length(&buf, buf_end);
+ if (!variable_buffer_data_size) {
+ av_log(avctx, AVERROR_INVALIDDATA, "Incomplete header\n");
+ return -1;
+ }
+ buf += variable_buffer_data_size;
+ }
+ }
+
+ if (buf >= buf_end) {
+ av_log(avctx, AVERROR_EOF, "Incomplete file\n");
+ return -1;
+ }
+ buf++;
+
+ switch (s->bits_per_color_id) {
+ case 2: // 32-bit
+ case 1: // 16-bit
+ avctx->pix_fmt = PIX_FMT_RGB48;
+ break;
+ // 8-bit
+ case 0:
+ av_log_missing_feature(avctx, "8-bit OpenEXR", 1);
+ return -1;
+ default:
+ av_log(avctx, AVERROR_NOFMT, "Unknown color format : %d\n", s->bits_per_color_id);
+ return -1;
+ }
+
+ if (s->picture.data[0])
+ avctx->release_buffer(avctx, &s->picture);
+ if (av_image_check_size(w, h, 0, avctx))
+ return -1;
+
+ // Verify the xmin, xmax, ymin, ymax and xdelta before setting the actual image size
+ if (xmin > w || xmin == ~0 ||
+ xmax > w || xmax == ~0 ||
+ ymin > h || ymin == ~0 ||
+ ymax > h || ymax == ~0 ||
+ xdelta == ~0) {
+ av_log(avctx, AVERROR_INVALIDDATA, "Wrong sizing or missing size information\n");
+ return -1;
+ }
+
+ if (w != avctx->width || h != avctx->height) {
+ avcodec_set_dimensions(avctx, w, h);
+ }
+
+ if (avctx->get_buffer(avctx, p) < 0) {
+ av_log(avctx, AVERROR_IO, "get_buffer() failed\n");
+ return -1;
+ }
+
+ ptr = p->data[0];
+ stride = p->linesize[0];
+
+ // Zero out the start if ymin is not 0
+ for (y = 0; y < ymin; y++) {
+ memset(ptr, 0, avctx->width * 6);
+ ptr += stride;
+ }
+
+ // Process the actual lines
+ for (y = ymin; y <= ymax; y++) {
+ uint16_t *ptr_x = (uint16_t *)ptr;
+ if (buf_end - buf > 8) {
+ /* Read the lineoffset from the line offset table and add 8 bytes
+ to skip the coordinates and data size fields */
+ const uint64_t line_offset = bytestream_get_le64(&buf) + 8;
+ // Check if the buffer has the required bytes needed from the offset
+ if (line_offset > avpkt->size - xdelta * current_channel_offset) {
+ // Line offset is probably wrong and not inside the buffer
+ av_log(avctx, AV_LOG_WARNING, "Line offset for line %d is out of reach setting it to black\n", y);
+ memset(ptr_x, 0, avctx->width * 6);
+ } else {
+ const uint8_t *red_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[0];
+ const uint8_t *green_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[1];
+ const uint8_t *blue_channel_buffer = avpkt->data + line_offset + xdelta * s->channel_offsets[2];
+
+ // Zero out the start if xmin is not 0
+ memset(ptr_x, 0, xmin * 6);
+ ptr_x += xmin * 3;
+ if (s->bits_per_color_id == 2) {
+ // 32-bit
+ for (x = 0; x < xdelta; x++) {
+ *ptr_x++ = exr_flt2uint(bytestream_get_le32(&red_channel_buffer));
+ *ptr_x++ = exr_flt2uint(bytestream_get_le32(&green_channel_buffer));
+ *ptr_x++ = exr_flt2uint(bytestream_get_le32(&blue_channel_buffer));
+ }
+ } else {
+ // 16-bit
+ for (x = 0; x < xdelta; x++) {
+ *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&red_channel_buffer));
+ *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&green_channel_buffer));
+ *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&blue_channel_buffer));
+ }
+ }
+
+ // Zero out the end if xmax+1 is not w
+ memset(ptr_x, 0, (avctx->width - (xmax + 1)) * 6);
+ ptr_x += (avctx->width - (xmax + 1)) * 3;
+
+ }
+ // Move to next line
+ ptr += stride;
+ }
+ }
+
+ // Zero out the end if ymax+1 is not h
+ for (y = ymax; y < avctx->height; y++) {
+ memset(ptr, 0, avctx->width * 6);
+ ptr += stride;
+ }
+
+ *picture = s->picture;
+ *data_size = sizeof(AVPicture);
+
+ return buf_size;
+}
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ EXRContext *s = avctx->priv_data;
+ avcodec_get_frame_defaults(&s->picture);
+ avctx->coded_frame = &s->picture;
+ return 0;
+}
+
+static av_cold int decode_end(AVCodecContext *avctx)
+{
+ EXRContext *s = avctx->priv_data;
+ if (s->picture.data[0])
+ avctx->release_buffer(avctx, &s->picture);
+
+ return 0;
+}
+
+AVCodec ff_exr_decoder = {
+ .name = "exr",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_EXR,
+ .priv_data_size = sizeof(EXRContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"),
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 4bbfcc6..9dfc5d3 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -21,7 +21,7 @@
#define AVCODEC_VERSION_H
#define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR 12
+#define LIBAVCODEC_VERSION_MINOR 13
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/libavformat/img2.c b/libavformat/img2.c
index b23e944..47dbb62 100644
--- a/libavformat/img2.c
+++ b/libavformat/img2.c
@@ -70,6 +70,7 @@ static const IdStrMap img_tags[] = {
{ CODEC_ID_JPEG2000 , "jp2"},
{ CODEC_ID_JPEG2000 , "jpc"},
{ CODEC_ID_DPX , "dpx"},
+ { CODEC_ID_EXR , "exr"},
{ CODEC_ID_PICTOR , "pic"},
{ CODEC_ID_XBM , "xbm"},
{ CODEC_ID_XWD , "xwd"},
diff --git a/libavformat/isom.c b/libavformat/isom.c
index 2042b65..9182008 100644
--- a/libavformat/isom.c
+++ b/libavformat/isom.c
@@ -225,6 +225,7 @@ const AVCodecTag ff_codec_movvideo_tags[] = {
{ CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'u', 'p') },
{ CODEC_ID_SGI, MKTAG('s', 'g', 'i', ' ') }, /* SGI */
{ CODEC_ID_DPX, MKTAG('d', 'p', 'x', ' ') }, /* DPX */
+ { CODEC_ID_EXR, MKTAG('e', 'x', 'r', ' ') }, /* OpenEXR */
{ CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 'h') }, /* Apple ProRes 422 High Quality */
{ CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 'n') }, /* Apple ProRes 422 Standard Definition */
diff --git a/libavformat/riff.c b/libavformat/riff.c
index 80a44b0..ccb587a 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -301,6 +301,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ CODEC_ID_ZEROCODEC, MKTAG('Z', 'E', 'C', 'O') },
{ CODEC_ID_Y41P, MKTAG('Y', '4', '1', 'P') },
{ CODEC_ID_FLIC, MKTAG('A', 'F', 'L', 'C') },
+ { CODEC_ID_EXR, MKTAG('e', 'x', 'r', ' ') },
{ CODEC_ID_NONE, 0 }
};
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